Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff1de00d1bd979a…

MALICIOUS

PDF

33.6 KB Created: 2020-05-18 02:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6476927bb108d40c9f3ba803eec825a3 SHA-1: ed90b997dad08ef5cc58ef634ee264f2694c829c SHA-256: bff1de00d1bd979ae76cd8d8b8920d4ee263540267b539eed0585d2b940687e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are numerically or generically named PDF files hosted on various domains. This pattern is indicative of a link farm designed to artificially inflate search engine rankings or to distribute malicious content. The document body, though heavily obfuscated, contains text related to 'piano sheet music free' and the URLs themselves suggest a lure. The primary attack pattern involves redirecting users to these external sites, which likely host further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bestbikevidz.com/uploads/1/3/1/6/131607108/131607108.html#come+sail+away+piano+sheet+music+free PDF link annotation
    • http://mediaminduae.com/uploads/1/3/0/6/130604935/2554453.pdfIn PDF document text
    • http://muncycartoons.com/uploads/1/3/1/8/131857513/xifidavususaf.pdfIn PDF document text
    • http://acsnutritionfitness.com/uploads/1/3/1/8/131856103/8200975.pdfIn PDF document text
    • http://heavenonearthhealth.com/uploads/1/3/0/6/130639380/70d5da.pdfIn PDF document text
    • http://emmashugs.com/uploads/1/3/0/9/130969190/fitimolunewavu.pdfIn PDF document text
    • http://t8fabcenter.com/uploads/1/3/0/7/130740116/3836903.pdfIn PDF document text
    • http://enterprisedataprocessing.com/uploads/1/3/1/0/131070806/5273907.pdfIn PDF document text
    • http://teachmemusic.academy/uploads/1/3/1/4/131453650/jopuzugato.pdfIn PDF document text
    • http://fairaircraftservices.com/uploads/1/3/1/4/131437074/2e257ed71228.pdfIn PDF document text
    • http://aacslpvancouver.com/uploads/1/3/0/6/130620704/5312941.pdfIn PDF document text
    • http://voicedoutcomesdirectory.com/uploads/1/3/0/5/130543369/425d33c2.pdfIn PDF document text
    • http://tikkunproject.org/uploads/1/3/0/4/130436006/26ef3ba83ab.pdfIn PDF document text
    • http://metallex.net/uploads/1/3/1/4/131438036/tawirununogoder.pdfIn PDF document text
    • http://taylorbrownfit.com/uploads/1/3/1/1/131164558/7714131.pdfIn PDF document text
    • http://barefootathletictraining.com/uploads/1/3/1/4/131410485/ed416.pdfIn PDF document text
    • http://legalshieldassociates.biz/uploads/1/3/1/0/131070124/govuzewop.pdfIn PDF document text
    • http://dirtyhippymovie.com/uploads/1/3/0/6/130604632/aa98804acb.pdfIn PDF document text
    • http://lorenzofiamma.net/uploads/1/3/0/4/130483368/2b631fd0180.pdfIn PDF document text
    • http://dearestjoe.com/uploads/1/3/1/8/131856310/a515d87b.pdfIn PDF document text
    • http://gammaloudspeakers.com/uploads/1/3/1/6/131606002/e20b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000562d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562D 10688 bytes
SHA-256: e083a49ac6b7b934cc9e585971227c56abf8262fa3524c120949805fa129c24e

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